Call station



FIG. 1 is a front perspective view of a first embodiment of call station embodying the design, a contrast in appearances between surfaces is shown; and,

FIG. 2 is a front perspective view of a second embodiment of a call station embodying the design, a contrast in appearances between surfaces is shown.

The contrast stipple shadings shown in the drawings represent contrasts in surface appearances. The broken lines represent portions of the call stations that form no part of the claimed design. 

CLAIM The ornamental design for a call station, as shown and described. 